syzkaller login: [ 41.875980] BUG: Bad rss-counter state mm:000000000d08b674 type:MM_FILEPAGES val:33 [ 41.877116] BUG: Bad rss-counter state mm:000000000d08b674 type:MM_ANONPAGES val:22 [ 42.052242] ================================================================== [ 42.053148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.054089] Read of size 8 at addr ffff888018e94798 by task sshd/225 [ 42.054958] [ 42.055173] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.056038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.057017] Call Trace: [ 42.057337] [ 42.057621] dump_stack_lvl+0x91/0xf0 [ 42.058105] print_report+0xcc/0x620 [ 42.058584] ? __virt_addr_valid+0x102/0x340 [ 42.059142] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.059763] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.060383] kasan_report+0xbe/0xf0 [ 42.060858] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.061470] vma_interval_tree_remove+0xc75/0xec0 [ 42.062067] vma_prepare+0xc54/0x11a0 [ 42.062546] __split_vma+0x5af/0x950 [ 42.063011] ? __pfx___split_vma+0x10/0x10 [ 42.063537] ? find_held_lock+0x2c/0x110 [ 42.064079] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.064645] ? lock_is_held_type+0x9f/0x120 [ 42.065184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.065792] ? mtree_range_walk+0x632/0x900 [ 42.066343] ? mas_walk+0x5c7/0x7c0 [ 42.066822] do_vmi_munmap+0x1f1/0x2b0 [ 42.067325] mmap_region+0x1f9/0x2660 [ 42.067812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.068330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.069049] ? __pfx_lock_acquire+0x10/0x10 [ 42.069589] ? __pfx_mmap_region+0x10/0x10 [ 42.070126] ? security_mmap_addr+0x7d/0xa0 [ 42.070650] ? get_unmapped_area+0x1f5/0x3f0 [ 42.071208] do_mmap+0x854/0xf00 [ 42.071661] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.072162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.072723] ksys_mmap_pgoff+0x3af/0x500 [ 42.073237] do_syscall_64+0x3f/0x90 [ 42.073722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.074367] RIP: 0033:0x7f04b6bf8d82 [ 42.074824] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 42.076970] RSP: 002b:00007ffcc8b74c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.077876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04b6bf8d82 [ 42.078722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04b6032000 [ 42.079569] RBP: 00007f04b6032000 R08: 0000000000000009 R09: 0000000000001000 [ 42.080415] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558625d0cb20 [ 42.081262] R13: 00007ffcc8b74c20 R14: 00007ffcc8b74c50 R15: 00007ffcc8b74fb0 [ 42.082120] [ 42.082413] [ 42.082627] Allocated by task 218: [ 42.083058] kasan_save_stack+0x22/0x50 [ 42.083560] kasan_set_track+0x25/0x30 [ 42.084056] __kasan_slab_alloc+0x59/0x70 [ 42.084584] kmem_cache_alloc+0x16b/0x370 [ 42.085101] vm_area_dup+0x20/0x160 [ 42.085554] __split_vma+0x170/0x950 [ 42.086019] split_vma+0xc6/0x110 [ 42.086459] mprotect_fixup+0x8d2/0xb30 [ 42.086961] do_mprotect_pkey+0x87e/0xd40 [ 42.087485] __x64_sys_mprotect+0x78/0xc0 [ 42.088021] do_syscall_64+0x3f/0x90 [ 42.088496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.089142] [ 42.089356] Freed by task 204: [ 42.089745] kasan_save_stack+0x22/0x50 [ 42.090246] kasan_set_track+0x25/0x30 [ 42.090744] kasan_save_free_info+0x2b/0x50 [ 42.091271] __kasan_slab_free+0x10a/0x190 [ 42.091811] kmem_cache_free+0x10d/0x4d0 [ 42.092318] rcu_core+0x8c8/0x2860 [ 42.092760] __do_softirq+0x1b7/0x7d4 [ 42.093235] [ 42.093451] Last potentially related work creation: [ 42.094036] kasan_save_stack+0x22/0x50 [ 42.094541] __kasan_record_aux_stack+0x8e/0xa0 [ 42.095112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.095776] remove_vma+0x139/0x170 [ 42.096228] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.096790] do_vmi_munmap+0x1f1/0x2b0 [ 42.097277] __vm_munmap+0x138/0x3a0 [ 42.097750] __x64_sys_munmap+0x59/0x80 [ 42.098250] do_syscall_64+0x3f/0x90 [ 42.098727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.099365] [ 42.099580] The buggy address belongs to the object at ffff888018e94740 [ 42.099580] which belongs to the cache vm_area_struct of size 168 [ 42.101078] The buggy address is located 88 bytes inside of [ 42.101078] freed 168-byte region [ffff888018e94740, ffff888018e947e8) [ 42.102493] [ 42.102709] The buggy address belongs to the physical page: [ 42.103394] page:000000008d44baf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e94 [ 42.104495] memcg:ffff88801595af01 [ 42.104922] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.105574] page_type: 0xffffffff() [ 42.106033] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.106956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801595af01 [ 42.107890] page dumped because: kasan: bad access detected [ 42.108561] [ 42.108781] Memory state around the buggy address: [ 42.109366] ffff888018e94680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.110227] ffff888018e94700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.111082] >ffff888018e94780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.111945] ^ [ 42.112443] ffff888018e94800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.113301] ffff888018e94880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.114150] ================================================================== [ 42.115119] Disabling lock debugging due to kernel taint [ 43.852679] BUG: Bad rss-counter state mm:000000009bcc5890 type:MM_FILEPAGES val:33 [ 43.853421] BUG: Bad rss-counter state mm:000000009bcc5890 type:MM_ANONPAGES val:22 [ 44.280188] BUG: Bad rss-counter state mm:000000001e328607 type:MM_FILEPAGES val:33 [ 44.281196] BUG: Bad rss-counter state mm:000000001e328607 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15524' (ECDSA) to the list of known hosts. 2023/06/19 20:04:27 fuzzer started 2023/06/19 20:04:28 dialing manager at localhost:44161 2023/06/19 20:04:28 checking machine... 2023/06/19 20:04:28 checking revisions... [ 45.024841] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:04:28 testing simple program... [ 45.079833] cgroup: Unknown subsys name 'net' [ 45.135367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:04:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801658f0d8 RCX=0000000000000001 RDX=1ffff11002cb1e1d RSI=ffff88801658ff38 RDI=ffff88801658f0e8 RBP=ffff88801658ff38 RSP=ffff88801658f030 R8 =ffffffff86128140 R9 =ffff88801658f118 R10=0000000000038001 R11=000000000001e4e6 R12=0000000000000008 R13=ffff888016588000 R14=ffff88801658ff40 R15=ffff88801658f0d8 RIP=ffffffff81130468 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9e3f525900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9e3f4de008 CR3=000000000fdd4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff90aa294e0 CR3=000000000e98e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2037323a34303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000